The 1960s were a thrilling era in the development of the feline sciences. The structure of cat DNA (the double felix) had already been discovered, and astronomers were working to put cat on the moon. Relive that golden era of scientific discovery with the Tumblr series Cat Scientists of the 1960s.

This single serving Tumblr mashes up vintage photos of chemists, engineers, physicians, physicists, and mathematicians with wide-eyed cats. Cats are, in fact, a natural fit for the scientifically minded; after all, they're both curious creatures. And you might just recognize a few of the felinized scientists in these pictures.